Menu
West county atlas

California county map

Explore all 58 counties. Select a county to see its map, or download a copy for your next project.

2025 Census boundaries58 mapped unitsCapital: Sacramento
Download / printJump to county list
Boundary map 100%
Labelled map of California counties Alameda CountyAlpine CountyAmador CountyButte CountyCalaveras CountyColusa CountyContra Costa CountyDel Norte CountyEl Dorado CountyFresno CountyGlenn CountyHumboldt CountyImperial CountyInyo CountyKern CountyKings CountyLake CountyLassen CountyLos Angeles CountyMadera CountyMarin CountyMariposa CountyMendocino CountyMerced CountyModoc CountyMono CountyMonterey CountyNapa CountyNevada CountyOrange CountyPlacer CountyPlumas CountyRiverside CountySacramento CountySan Benito CountySan Bernardino CountySan Diego CountySan Francisco CountySan Joaquin CountySan Luis Obispo CountySan Mateo CountySanta Barbara CountySanta Clara CountySanta Cruz CountyShasta CountySierra CountySiskiyou CountySolano CountySonoma CountyStanislaus CountySutter CountyTehama CountyTrinity CountyTulare CountyTuolumne CountyVentura CountyYolo CountyYuba County
Select a county to highlight its boundary.
2025 U.S. Census boundaries. Zoom to reveal more names. Drag to pan when zoomed; use arrow keys, + and − with the map focused.

Download this map

Choose a format for printing, editing, or sharing. All downloads are free.

SVG

SVG is editable vector artwork. PNG is a high-resolution image. PDF uses landscape Letter pages, with a separate key when needed.

Downloads contain the complete boundary map, independent of zoom. Crowded names use a numbered key. Numbered quiz maps use the county list / answer key (CSV). Boundary data (GeoJSON) · Reuse with source credit.

Roads, terrain & aerial imagery

Explore California with a county boundary overlay. Choose a view to load the interactive map.

Select a map view above

Street names, terrain, or aerial photography with the county boundary in view.

Backgrounds load from OpenStreetMap or USGS only when selected. Imagery dates and detail vary by location.

Map scope: Use the boundary map for names and shapes, or the interactive background viewer for roads, terrain, and aerial imagery. County boundaries do not identify parcels or ZIP codes.

California county geography overview

California has 58 counties, which places it 27th among the 50 state and District of Columbia maps in this atlas when ordered by number of county-level units. Their combined 155,860.4 square miles of land place the state 3rd by mapped land area.

The average county-level area is 2,687 square miles, while the median is 1,536 square miles. The median is often the better description of a typical unit because one or two very large areas can pull the average upward. The five largest units together account for about 33% of the state’s mapped land area.

58county-level units
1,536 sq mimedian land area
20,068.4 sq milargest unit
5%share of mapped area that is water

Largest and smallest California counties

San Bernardino County is the largest county-level unit by land area at 20,068.4 square miles. It represents about 13% of all mapped land in California. At the other end of the range, San Francisco County has 46.7 square miles of land.

Largest by land area

  1. San Bernardino County20,068.4 sq mi
  2. Inyo County10,197.3 sq mi
  3. Kern County8,134.7 sq mi
  4. Riverside County7,209 sq mi
  5. Siskiyou County6,278.8 sq mi

Smallest by land area

  1. San Francisco County46.7 sq mi
  2. Santa Cruz County445.1 sq mi
  3. San Mateo County448.6 sq mi
  4. Marin County520.1 sq mi
  5. Amador County594.6 sq mi

Rankings use land area rather than total area. This avoids making coastal or lake counties appear larger solely because their boundaries include extensive water.

Alphabetical list of California counties

The table is alphabetical, so it works as a name and FIPS-code reference rather than an area ranking. Every identifier begins with the California state FIPS prefix 06. Land and water figures are rounded to one decimal place.

58 county-level areas

Download county data / numbered map key (CSV)
No.NameFIPS codeLand areaWater area
1Alameda County06001737.5 sq mi83.7 sq mi
2Alpine County06003738.3 sq mi4.8 sq mi
3Amador County06005594.6 sq mi11.4 sq mi
4Butte County060071,636.5 sq mi40.6 sq mi
5Calaveras County060091,020 sq mi16.9 sq mi
6Colusa County060111,150.6 sq mi5.7 sq mi
7Contra Costa County06013716.9 sq mi87 sq mi
8Del Norte County060151,006.2 sq mi223.5 sq mi
9El Dorado County060171,707.8 sq mi78.5 sq mi
10Fresno County060195,958.6 sq mi52.8 sq mi
11Glenn County060211,313.9 sq mi13 sq mi
12Humboldt County060233,568 sq mi484.2 sq mi
13Imperial County060254,175.5 sq mi305.1 sq mi
14Inyo County0602710,197.3 sq mi29.8 sq mi
15Kern County060298,134.7 sq mi30.2 sq mi
16Kings County060311,391 sq mi1.2 sq mi
17Lake County060331,255.1 sq mi73 sq mi
18Lassen County060354,541.4 sq mi178.7 sq mi
19Los Angeles County060374,060.3 sq mi689.1 sq mi
20Madera County060392,136.7 sq mi16.3 sq mi
21Marin County06041520.1 sq mi308 sq mi
22Mariposa County060431,448.8 sq mi14 sq mi
23Mendocino County060453,506.8 sq mi371.3 sq mi
24Merced County060471,938 sq mi40.6 sq mi
25Modoc County060493,948.2 sq mi255 sq mi
26Mono County060513,048.9 sq mi82.9 sq mi
27Monterey County060533,281.7 sq mi489.5 sq mi
28Napa County06055752 sq mi40.3 sq mi
29Nevada County06057957.8 sq mi16 sq mi
30Orange County06059793.2 sq mi156.5 sq mi
31Placer County060611,407.4 sq mi94.8 sq mi
32Plumas County060632,553.1 sq mi60.4 sq mi
33Riverside County060657,209 sq mi93.7 sq mi
34Sacramento County06067965.4 sq mi29 sq mi
35San Benito County060691,388.7 sq mi1.8 sq mi
36San Bernardino County0607120,068.4 sq mi37.2 sq mi
37San Diego County060734,210.9 sq mi315 sq mi
38San Francisco County0607546.7 sq mi185.2 sq mi
39San Joaquin County060771,392.3 sq mi34.3 sq mi
40San Luis Obispo County060793,300.8 sq mi314.9 sq mi
41San Mateo County06081448.6 sq mi292.4 sq mi
42Santa Barbara County060832,733.9 sq mi1,053.7 sq mi
43Santa Clara County060851,291.1 sq mi13 sq mi
44Santa Cruz County06087445.1 sq mi162.1 sq mi
45Shasta County060893,775.7 sq mi71.7 sq mi
46Sierra County06091953.2 sq mi9 sq mi
47Siskiyou County060936,278.8 sq mi69.2 sq mi
48Solano County06095821.7 sq mi84.4 sq mi
49Sonoma County060971,575.3 sq mi192 sq mi
50Stanislaus County060991,496.2 sq mi17.9 sq mi
51Sutter County06101602.7 sq mi5.7 sq mi
52Tehama County061032,949.1 sq mi13 sq mi
53Trinity County061053,179.3 sq mi28.3 sq mi
54Tulare County061074,823.9 sq mi14.4 sq mi
55Tuolumne County061092,220.9 sq mi53.5 sq mi
56Ventura County061111,840.8 sq mi365.8 sq mi
57Yolo County061131,013 sq mi8.8 sq mi
58Yuba County06115632 sq mi12 sq mi

How to read and use this map

County lines are administrative boundaries, not postal routes. A mailing address can use a city name associated with a neighboring area, and ZIP codes can cross county lines. When you need to identify a county for an address, confirm it with an official geocoder or local government source.

For classroom or planning use, download a PDF from the controls above. Labelled exports use numbered callouts for crowded areas; numbered quiz maps match the alphabetical county list. SVG files keep the boundary lines sharp at larger paper sizes.

Frequently asked questions

How many counties are in California?

California has 58 counties in the U.S. Census Bureau’s 2025 cartographic boundary file.

Can I print this California county map?

Yes. Choose Download / print and select PDF for a landscape Letter page, PNG for an image, or SVG for editable vector artwork. Because the map is SVG, its boundary lines stay sharp when scaled.

What is the largest county in California?

San Bernardino County is the largest by land area in this dataset at 20,068.4 square miles. This is an area ranking, not a population ranking.

What is the smallest county in California?

San Francisco County is the smallest by land area in this dataset at 46.7 square miles.

Are these legal survey boundaries?

No. This is a generalized reference map. Property, parcel, election, and legal boundary questions should be checked with the relevant state or local agency.

Map source

U.S. Census Bureau, 2025 Cartographic Boundary File, Counties, 1:5,000,000. Land and water area fields are supplied in the same file and converted from square meters to square miles. Accessed September 27, 2026.